Hi Pear - I'm at the point today, too. Being a very visual person, I decided to get creative, and make my plot a little more real.
I have a bunch of families in my story (about 3 right now) as well as assorted loose characters. So I did some selective (and highly creative) culling of my kids' Halloween candy and came up with this:
Lollipops of different colours were Family 1 members;
Chocolate bars of different kinds, Family 2 members;
Loose candy of different types, Family 3 peeps;
And assorted characters became... assorted candy bits. ;)
I stuck PostIts with each character's name on the appropriate candy, and "played out" my plot on the dining room table (to my children's hysterical laughter) and you know what? I have a MUCH better idea of where everything fits in, and how everything needs to go from now on (I wisely wrote it down as I went along).
Naturally, "where it all fits in" became my mouth, in the case of certain unfortunate characters who were "marked for death"... teehee!
(well, it's supposed to be a fun exercise, isn't it?) :)
PS What is going on with the NaNo site? Is anyone else unable to get on at all? It's been a sad, forum-less afternoon and evening for me.